Accessory Dwelling Units
High-End ADUs for Estate Properties
Regulation-aware, design-forward ADUs positioned as estate-supporting residences for Healdsburg and Sonoma County properties.
Schedule ConsultationADUs That Respect Your Estate
Most ADUs are designed as rental units—cheap construction, builder-grade finishes, and minimal architectural consideration.
For high-value wine-country estates, that approach is unacceptable. Your ADU should enhance your property value, not compromise it.
We design and build ADUs with the same architectural sensitivity as custom guest houses—compliant with Healdsburg and Sonoma County regulations but thoughtfully integrated with your estate's character.
Design-Forward Approach
Estate-Supporting Residences
Our ADUs are designed to maintain—and enhance—your property's architectural character and long-term value.
- Architectural CoordinationDesigned to complement your main residence, not compete with it
- Discreet SitingThoughtful placement that respects privacy and landscape views
- Material QualityFinishes appropriate for estate properties, not rental units
- Code-Compliant PlanningExpert navigation of Sonoma County ADU regulations
Detached & Attached ADUs
We design both detached and attached ADUs, tailored to your property's layout and zoning constraints.
Detached ADUs
Standalone structures that function like guest houses but meet ADU regulatory requirements.
- Separate structure with privacy
- Own utilities and access
- Traditional or contemporary styles
- Up to 1,200 sq ft (depending on zoning)
Attached ADUs
Additions to your main residence that function as separate living spaces with private entrances.
- Connected to main residence
- Shared or separate utilities
- Seamless architectural integration
- Often easier permitting process
Ideal Applications
Best For Estate Properties Requiring Compliant Secondary Dwellings
ADUs work well for luxury estates that need additional living space while navigating zoning regulations.
Luxury Estates with Zoning Constraints
Properties where a full guest house exceeds setbacks or coverage limits, but an ADU is permissible.
Privacy-Focused Properties
Secondary dwellings for family, estate managers, or caretakers who need private accommodations.
Long-Term Value Enhancement
Adding functional square footage in a way that enhances rather than compromises property value.
What's Included
Full-service ADU design and construction with expertise in Sonoma County regulations.
Detached and Attached ADUs
- Standalone structures
- Additions to main residence
- Garage conversions (where appropriate)
- Custom layouts and finishes
Code-Compliant Planning
- Sonoma County ADU regulations
- Setback and coverage analysis
- Utility connection planning
- Fire safety and egress requirements
Architect-Led Layouts
- Functional space planning
- Material and style coordination
- Kitchen and bath design
- Storage and efficiency optimization
Discreet Siting & Access Strategy
- Privacy-conscious placement
- Landscape integration
- Separate or shared access planning
- Parking and utility coordination
Interior Quality
Estate-Quality Interiors
Our ADUs feature the same quality finishes and thoughtful design as custom guest houses.
Open Living Spaces
High ceilings, abundant natural light, and efficient floor plans that feel spacious and contemporary.
Functional Kitchens
Compact yet well-designed kitchens with quality appliances, stone counters, and modern cabinetry.
ADUs Completed
Across wine-country estates
Code Compliance
Sonoma County ADU expertise
ADU Types
Tailored to your property
ADU Development Process
Navigating regulations while maintaining design quality for estate properties.
ADU Feasibility Analysis
Determine what's possible on your property given zoning, setbacks, and Sonoma County ADU regulations.
Zoning review • Setback analysis • Site constraints • Regulatory compliance
Design Development
Architect-led layouts that balance code compliance with architectural sensitivity to your estate.
Compliant planning • Style coordination • Material selection • Design refinement
Permitting & Approvals
Navigate ADU-specific regulations and secure all necessary approvals for your property.
ADU permit applications • Planning department coordination • Utility planning • Code compliance
Construction & Completion
Build your ADU with the same quality standards as a custom guest house—not a rental afterthought.
Quality construction • Discreet siting • Material coordination • Final inspections
Healdsburg ADU FAQs
What are ADU regulations in Sonoma County?
Sonoma County allows detached ADUs up to 1,200 sq ft and attached ADUs up to 50% of the main residence. Setbacks typically require 4 feet from side/rear property lines. We navigate all local regulations.
How much does a luxury ADU cost in Healdsburg?
High-end ADUs for estate properties typically range from $400–$600 per square foot, depending on finishes, site conditions, and architectural complexity. We provide detailed budgets during consultation.
Can I use an ADU for family or caretaker housing?
Yes. ADUs are ideal for multigenerational living, estate managers, or caretaker accommodations while maintaining privacy and separate living quarters.
How long does ADU permitting take in Sonoma County?
ADU permitting in Sonoma County typically takes 2–4 months, faster than standard construction permits. We handle all coordination with planning departments.
Related Estate Services
Explore other architectural solutions for your wine-country estate.
Custom Guest Houses
Need larger accommodations? Our custom guest houses provide more space and flexibility for multi-generational estates or private hospitality.
Explore Guest HousesPermitting & Feasibility
Not sure if an ADU is feasible on your property? Our ADU feasibility consulting provides clarity before you invest in design.
Get Feasibility AnalysisADU Construction Across Wine Country
Expert ADU construction throughout Healdsburg and Sonoma County wine regions.
Ready to Add an ADU to Your Estate?
Let's discuss feasibility, zoning, and design options for your property.
Schedule Consultation